The development of the world's first vaccine against malaria is an extraordinary scientific breakthrough, but there are several reasons to be cautious about the difference this vaccine could make, on the basis of current results.

We have never had a vaccine for a parasitic disease, and the scientific complexity is dizzying. But at this week's Malaria Forum, I was pleased to announce the interim results of a trial for a vaccine candidate.

Earlier this year, President Obama went to Africa and issued this simple statement: "Africa's future is up to Africans." He highlighted the power of Christians and Muslims in Nigeria working side-by-side to end malaria.